Longtime coleopterist, retired from Field Museum of Natural History in Chicago (curator 1985-2008). Special interest in systematics, biology and evolution of Staphylinidae, Leiodidae and other Staphylinoidea Field work from 1980 on focused on southern temperate areas of Australia, New Zealand and Chile. Maintain StaphBase, world catalog of Staphylinoidea, Histeroidea and Hydrophiloidea, with online version at Catalogue of Life: https://www.catalogueoflife.org/data/dataset/1204